Pyrometer well



June 6, 1939. I F. H. REES 7 ,4

PYROMETER WELL Filed Jan. l8, 1957 INVENT R Frank h. ees

' 20 materials are employed and corrosion of the well Patented June 6, 193 2,161

UNITED STATES/PATENT OFFICE PYROMETER WELL Frank H. R .ees, Ponca City, ()kla., assign r to Continental Oil Company, Ponca City, kla., a corporation of Delaware Application January 18, 1937, Serial'No. 121,049 2- Claims. 136-4) My invention relates to pyrometer wells or wel1s Figure -2 is a sectional view of my thermometer for thermometers or other heat responsive means well assembly. Y

' for measuring the temperature within conduits Figure 3 is a sectional view taken on a line 3- -3 or chambers used in various industrial processes. of Figure 2.

It has been customary to place a heat expansive In general,-my invention contemplates the pro- 1 means in a well which comprises an elongated vision of a bushing for insertion into 'a' threaded tube closed at one end, adapted to beinserted opening in a conduit or chamber which bushing'is through the side wall of a chamber or conduit in provided with means for removably receiving a, which liquid or materials are being processed, the thermometer well. i temperature of which it is desired to record. The More particularly refe g o e aw h elongated tube is usually fitted and made integral a bushing I which may be made of any strength with means for securing it in a threadedop'ening material such as steel, is externally threaded with or the like formed in the side wall of the conscrew threads 2 for insertion'into a correspondduit or chamber. The thermometer wells are exihgly t e Opening in & Vessel the p a- 5 pansive andb'eing made of a single pieee of met ture of which it is desired to observe. The busht b designed from th point of view, of ing is provided with internal screw threads 3 by strength especially in cases where high pressures means of whieha thermometer Well 4, p v ded exist within the spaces the temperatures of' w h s w. t a 5 a i open d, sadap d which are being measured. Frequently, corrosive to be ppor ede thermometer Well 4 y be made out of corrosion resisting material such "will necessitate the replacement of the entire well." as copper s. the ike. The screw threads A weak point in the present construction exists po o ed at a distance removedirom the in the region where the well proper is formed by inner e, 5 0f e bushing I SO t at the-side machining the metal to a minimum thickness. walls 1 of the bore in which the thermometer well The portion of larger thickness is threaded for is seated will act to supportth upper en of the 2 insertion into the' side wall of a conduit or cham-- f thermometer w l preventing u du t a n upon be g Unfortunately, non-corrosive 7 materials the screw threads with a possible breaking Off Of often lack suflicient strength to be safely emthe thermometer Well at this pointppe ployed where high pressures are used. c 1 x end of thewell is provided with a portion of re- Any'injury of a thermometer well necessitates duced diameter which is screw hre d d-at '3 t disposal a replacement, thus forming a shoulder B which is adapted to mometer well construction in which the well is body of theb shi g Supported n the reg-ion of e juncture between It IS beheved my construction will be clear One object of my inventionis to provide a therseat against a similar shoulder 9 formed in the I the bushing and the well pmpen I from the foregoing description. It will be ob- 3 Another objet ofmy invention is t6 provide a servedthat Ihave accomplished the objects of my thermometer well construction in which a cormventlon I am p to provide thermom rosion resisting mtal may employed for eter well construction in which the bushing may anda suengthmatenal may be employed be made of strength material and the well per 40 for the b 1 fig. se may be made, of corrosion resisting material. 4

Another object invention is to bmvide The weak point in the thermometer wells of the.

V removable thermometer ,weu whereby the! prior art at the point of reduction of the die V ameter of the bushing to' form the well proper is e m Wells of were! lengths and construe eliminated by the recessing of the tip threads tions may be employed in acommon bushing.

of the thermometer well into the bushin bod l e Other a111d further i e se i/i i wi thus providing support by the side walls of th e 4 app m e fell-Owing deserlptlorlbore supporting the well ,as a cantilever. It will e mpanying drawin whi forms p be observed that it is possible tot-use a compara- 0f t e fipec fiea en and is to be read in tively small. number of bushings, while having a coniunction therewith a n whi h like r ference large number of wells of diiTerent lengths for dift1 numerals are used to indicate like parts in the ferent surfaces. Injury to the well in use wofild various views, not necessitate the replacing of the entire as- Figure 1 is a perspective view showing my sembly as is the case in the wells of the prior art. thermometer well assembly in disassembled posi- The wells of the prior art cost from eight dol- 5 tion. is V r lars to ten dollars, since they are made ,of one 5g piece of metal and require considerable machine work. The thermometer wells of my invention can be made for from two dollars to two and one half dollars each, thus representing a considerable economic advantage.

It will be understood that certain features and sub-combinations are of utility and may be employed without reference to other features and sub-combinations. This is contemplated by and is within the scope of my-claims. obvious that various changes may be made in de'- tails within the scope of my claims without departing from the spirit of my invention. It is, therefore, to be understood that my invention is not to be limited to the speciflcdetails shown and described.

Having thus described my invention, what I' claim is:

,1. In a thermometer well a bushing adapted to It is further be threadedly supported by a wall of a chamber, the temperature of which it is desired to measure, a bore formed within said bushing, said bore being provided with an internal shoulder at a point removed from the lower end of said bushing, screw threads provided within said bore above said shoulder and a thermometer tube provided with coacting screw threads and shoulder at its upper and adapted to be seated in said bushing bore with said tube shoulder sealed against said bore shoulder, the external diameter of said thermometer tube being substantially the same as the internal diameter of said bore whereby said thermometer tube will be supported by the interior walls of said bushing.

2. A thermometer well as in claim 1 wherein said bushing is made of steel and said thermometer tube is made of non-corrosive material.

, FRANK H. REES. 

